Patents by Inventor Kuowei Chang

Kuowei Chang has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20150112278
    Abstract: Systems and methods for placement of an introducer needle into the subclavian vein. A needle for subclavian vein penetration includes a straight needle portion, a bent needle portion, and a hub. The bent portion allows for needle placement with minimized chance of complications. The needle and hub form a lumen through which a guide wire can be placed. The bent needle portion has an inner diameter substantially similar to the inner diameter of the straight needle portion to reduce resistance due to movement of the guide wire.
    Type: Application
    Filed: October 21, 2013
    Publication date: April 23, 2015
    Applicant: Optima MDevice Technology Corporation
    Inventors: Subir Ray, Bireswar Chakraborty, Kuowei Chang
  • Publication number: 20140207047
    Abstract: A bioactive agent delivery device having a plurality of reservoirs wherein each reservoir houses a solvent provides a means for separable and segregated delivery of bioactive agent(s) to a patient. The device can include a plurality of absorbent materials wherein each absorbent material is pretreated with a bioactive agent and a delivery mechanism operable to deliver to any of the plurality of absorbent materials a controlled portion of solvent from any of a plurality of reservoirs. A diffusion layer interposed between the absorbent materials and an epidermis transfers the bioactive agent from the absorbent materials to the epidermis for delivery of the bioactive agent.
    Type: Application
    Filed: January 16, 2014
    Publication date: July 24, 2014
    Applicant: Chrono Therapeutics, Inc.
    Inventors: Guy DiPierro, Michael Barsness, Bireswar Chakroborty, Kuowei Chang
  • Publication number: 20110066134
    Abstract: Pharmaceutical drugs and formulations suitable for iontophoresis thereof that provide enhanced iontophoretic delivery of an anti-fungal drug to at least one body surface, such as a nail, are described. Also described are pharmaceutical formulations suitable for iontophoresis comprising terbinafine and methods for administering terbinafine to a body surface via iontophoresis. When the drug source is introduced into the nail using a mask, terbinafine concentrations in peripheral areas of nail following iontophoretic treatment are less than drug concentrations directly under the mask. Further, differences in delivered drug concentrations is effectuated by creating drug delivery gradients. Drug can be delivered to dissimilar tissues based on different transfer efficiencies exhibited by the dissimilar tissues, resulting in higher percentage delivery in one tissue vs. another tissue.
    Type: Application
    Filed: April 7, 2010
    Publication date: March 17, 2011
    Inventors: Michael Barsness, Shawn Davis, Robert Etheredge, Kuowei Chang, Hyun Kim
  • Publication number: 20080312579
    Abstract: An electrokinetic apparatus to apply medicament to a treatment site of a mammalian user, the apparatus including: a segmented active electrode; a medicament matrix having one side abutting the segmented active electrode and another side adapted to contact a surface of skin over the treatment site, wherein the matrix includes at least one current direction barrier suppressing transverse current flow through the matrix.
    Type: Application
    Filed: June 16, 2008
    Publication date: December 18, 2008
    Inventors: Kuowei Chang, Dennis I. Goldberg, Robert W. Etheredge, Michael S. Barsness
  • Publication number: 20080051692
    Abstract: An applicator for a device for electrokinetic delivery of medicament to a treatment site includes an applicator head having an active electrode, a matrix, and a medicament or a medicament and an electrically conductive carrier, carried by the matrix in electrical contact with the electrode. The cartridge includes a plurality of raised projections allowing the matrix and head to be ultrasonically welded one to the other. The electrode opens through a face of the head remote from the matrix for connection with an electrical connector carried by the device. A lid overlies the matrix and is releasably attached to a margin of the head. The lid includes layers of different materials with one of the layers formed of a metallic material having a discontinued interface with the lid and a tab carried by the lid.
    Type: Application
    Filed: November 30, 2006
    Publication date: February 28, 2008
    Inventors: John Petersen, Dennis Goldberg, James Kelland, Robert Ehteredge, Michael Barsness, Kuowei Chang
  • Patent number: 3931589
    Abstract: An improved ion-laser system utilizing a cold, perforated-wall hollow-cate electron-beam discharge to produce a high energy, high intensity self-collimated electron-beam to provide a high efficiency, high power continuous wave or pulsed ion-laser oscillations in both visible and ultra-violet ranges.
    Type: Grant
    Filed: March 21, 1974
    Date of Patent: January 6, 1976
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Sol Aisenberg, Kuowei Chang